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Hi-resolution multi-color TFT LCD MFD620C Digital Detectors Portable Ultrasonic Flaw Detection

1 Introduction

     The MFD620C is an advanced digital ultrasonic flaw detector featuring a multi-color TFT LCD and a host of new features to meet challenging inspection requirements. It combines powerful flaw detection and measurement capabilities, extensive data storage, and the ability to transfer detailed inspection data to the PC via its high-speed USB port.
The instrument incorporates many advanced signal processing features including a 15MHz RF bandwidth to permit testing of thin materials, narrowband filters to improve signal to noise in high gain applications, a spike pulser for applications requiring higher frequencies, and a tunable square wave pulser to optimize penetration on thick or highly attenuating materials.
The instrument can be widely used in locating and sizing hidden cracks, voids, disbands, and similar discontinuities in welds, forgings, billets, axles, shafts, tanks and pressure vessels, turbines, and structural components.
 

1.1 Features of the Instrument
    The instrument extends the performance and range of applications that are capable of being satisfied by a portable instrument. The quality, portability, durability, and dependability that you have come to expect from the popular MFD Series of instruments remain.
Display
Hi-resolution multi-color TFT LCD with 4 user-selectable brightness control provides high contrast viewing of the waveform from bright, direct sunlight to complete darkness. 
The hi-resolution multi-color TFT LCD display with fast 60 Hz update gives an ?analog look? to the waveform providing detailed information that is critical in many applications including nuclear power plant inspections. 
Range
Up to 6000 mm in steel; range selectable in fixed steps or continuously variable. Suitable for use on large work pieces and in high-resolution measurements.
Pulser
Pulse Energy selectable among 200V, 300V, 400V, 500V and 600V..
Pulse Width tunable from 0.1µs to 0.5 µs to match the probes with different frequency.
Pulse Repetition Frequency adjustable from 10 Hz to 1 KHz in 1 Hz increments. 
Damping selectable among 68?100?150? and 500? for optimum probe performance
Test Modes include Pulse echo, dual and thru-transmission 
Receiver
Sampling:10 digit AD Converter at the sampling speed of 160 MHz 
Rectification:Positive Halfwave, Negative Halfwave, Fullwave and RF
Analog Bandwidth: 0.5MHz to 15MHz capability with selectable frequency ranges (automatically set by the instrument) to match probe for optimum performance.
Gain:0 dB to 110 dB adjustable in selectable steps 0.1 dB, 1.0dB, 2 dB, 6 dB, and locked. 
Gates
Two fully independent gates offer a range of measurement options for signal height or distance using peak triggering. 
The echo-to-echo mode allows accurate gate positioning for signals which are extremely close together.
Gate Start: Variable over entire displayed range
Gate Width: Variable from Gate Start to end of displayed range
Gate Height: Variable from 0 to 99% Full Screen Height
Alarms: Threshold positive/negative
Memory
Memory of 1000 channel files to store calibration set-ups
Memory of 10000 wave files to store A-Scan patterns and instrument settings.
All the files can be stored, recalled and cleared.
Video Recorder
Screen scenes can be captured as movie files.  As long as 2 hours movie can be saved to the inside memory.  It can be re-played using the instrument or the PC software delivered with the instrument.
Video Recorder is useful in many situations, it is very convenient for those who want to analyze the probing activities later.
Functions
 Totally protected against the ingress of dust and high pressure jets of water according to IP65.
 Semiautomatic two point calibration: Automated calibration of transducer zero offset and/or material velocity
 Flaw Locating:Live display Sound-path, Projection (surface distance), Depth, Amplitude, 
 Flaw sizing: Automatic flaw sizing using AVG/AVG or DAC, speeds reporting of defect acceptance or rejection.
 Digital Readout and Trig. Function: Thickness/Depth can be displayed in digital readout when using a normal probe and Peam path, Surface Distance and Depth are directly displayed when angle probe is in use.
 Both the DAC and the AVG method of amplitude evaluation are available.
 AWS D1.1.
 Curved Surface Correction feature
 Crack Height Measure function
 Weld figure feature
 Magnify gate:spreading of the gate range over the entire screen width
 Video Recording and play
 Auto-gain function
 Envelope: Simultaneous display of live A-scan at 60 Hz update rate and envelope of A-scan display
 Peak Hold: Compare frozen peak waveforms to live A-Scans to easily interpret test results.
 A Scan Freeze:Display freeze holds waveform and sound path data
 B Scan display feature
Real Time Clock
The instrument clock keeps running tracking the time.
Communication
High speed USB2.0 port. Two USB modes can be selected: U-DISK and U-BRIDGE. In U-DISK mode, the instrument acts as a USB flash disk when connected to PC. Configuration files, saved pictures and recorded movies can be copied to PC when possible. In U-BRIDGE mode, the instrument exchanges data with DataPro Software. The optional DataPro software helps manage and format stored inspection data for high-speed transfer to the PC. Data can be printed or easily copied and pasted into word processing files and spreadsheets for further reporting needs. New features include live screen capture mode and database tracking.
Battery
Internal rechargeable Li-ion battery pack rated 7.2V at 8800 mAh 
10 hours nominal operating time depending on display brightness
8-10 hours typical recharge time
Knob
Operating adjustments are easily and quickly made using the rotary knob.
1.2 Specifications
 Range: 0 to 6000 mm, at steel velocity
 Material Velocity: 1000 to 15000m/s
 Display Delay: -20 to 3400 µs
 Probe Delay/Zero Offset : 0 to 99.99µs
 Sensitivity: 110 dB max in selectable resolution 0.1, 1.0, 2.0, 6.0 dB and locked.
 Test Modes: Pulse echo, dual element and thru-transmission
 Pulser: Tunable Square Wave Pulser
 Pulse Repetition Frequency ranges from 10 Hz to 1000 Hz
 Pulse Energy: 200V, 300V, 400V, 500V, 600V selectable
 Bandwidth (amplifier band pass ): 0.5 to 15 MHz
 Gate Monitors: Two independent gates controllable over entire sweep range
 Rectification: Positive half wave, negative half wave, full wave, RF
 System Linearity: Horizontal: +/-0.2% FSW, Vertical: 0.25% FSH, Amplifier Accuracy +/-1 dB.
 Reject (suppression): 0 to 80% full screen height
 Units: Inch or millimeter
 Transducer Connections: BNC or LEMO
 Power Requirements: AC Mains 100-240 VAC, 50-60 Hz
 Operating Temperature: -10 to 50
 Storage Temperature: -30 to 50
1.3 Base Instrument Package
Portable Ultrasonic Flaw Detector with multi-color TFT LCD Display
Straight Beam Transducer (4 MHz, ?10)
Angle Beam Transducer (4 MHz, 8 mm×9 mm, 60°)
Interconnect Cable for the transducer (Q9-C5,or optional C9- C5)
Rechargeable Li-Ion Battery Package, 8.8 amp hour
Power supply/charger unit
Operating Manual in English
Datapro Software
USB Cable (Model: MUSB01)
Carrying Case